/*
 * Copyright 2020 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package app.cash.paging

@ExperimentalPagingApi
expect abstract class RemoteMediator<Key : Any, Value : Any>() {
  abstract suspend fun load(
    loadType: LoadType,
    state: PagingState<Key, Value>,
  ): RemoteMediatorMediatorResult

  open suspend fun initialize(): RemoteMediatorInitializeAction
}

expect sealed class RemoteMediatorMediatorResult

expect class RemoteMediatorMediatorResultError(throwable: Throwable) {
  val throwable: Throwable
}

expect class RemoteMediatorMediatorResultSuccess(
  endOfPaginationReached: Boolean,
) {
  val endOfPaginationReached: Boolean
}

expect enum class RemoteMediatorInitializeAction {
  LAUNCH_INITIAL_REFRESH,

  SKIP_INITIAL_REFRESH,
}
